Tumor marker tests can be used at various stages of cancer care:
1. Screening: In some cases, tumor markers can be used to screen for cancers in asymptomatic individuals. 2. Diagnosis: These tests can assist in diagnosing cancer by confirming the presence of specific markers associated with particular types of cancer. 3. Prognosis: The levels of certain tumor markers can provide information about the likely course and outcome of the disease. 4. Monitoring Treatment: Tumor marker levels are often measured during treatment to assess the effectiveness of therapies. 5. Detecting Recurrence: Regular monitoring of tumor marker levels can help detect the recurrence of cancer after treatment.